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How to Fix Sharp TV Flickering Screen (STEPS)

Why does my Sharp TV screen keep flickering?

The Sharp TVflickering screen problem could be a result of cable issues, a component malfunction, or energy saving feature.



  • Cable Issues
  • Brightness Level
  • Energy Saving Mode
  • Faulty Component
  • Signal Problem
  • Bugs and Glitches
  • Problem with Input Source
  • Power Shortage
  • Outdated Firmware
  • Protection Mode


Cable Issues

The most common reason why your Sharp TVscreen keeps flickering is the cable issues. It might be due to issues with your HDMI cable. For instance, if you are trying to watch HDR videos, older 1.4 cables will lead to a black screen or flickering.


Brightness Level

Most smart TVs out there, including Sharp TVs, come with an auto-brightness feature. This feature adjusts your screen brightness depending on the brightness level of your room. So, if your room has extreme lighting conditions, you’ll experience screen flickering.


Energy Saving Mode

Smart TVs are becoming more ad more eco-friendly. Most Sharp TV models come with the energy-saving mode that modifies your device to save power. Sometimes, this feature can lead to flickering issues due to room conditions.


Faulty Component

When it comes to electronic devices, you can never rule out the possibility of hardware failure. Regardless of their durability and quality, these devices are prone to overheating and other problems. If your Sharp TV has some faulty components, you’ll encounter several display-related issues, including flickering!


Signal Problem

Have you checked the signal strength on your smart TV? If your device isn’t getting enough signals, it won’t be able to broadcast smoothly, leading to screen flickering and a black screen issue.


Bugs and Glitches

The more you use a smart appliance, the more bugs and glitches it will have. Mostly, these bugs and glitches are fixed in newer operating system updates. However, until then, you’ll encounter software-related issues, including Sharp TV screen flickering.


Problem with Input Source

Are you using cable or satellite service with your Sharp TV? If so, the flickering screen issue might be due to problems with the input source. Your TV might not be getting signals from external devices, leading to a black screen and flickering.


Power Shortage

Another common cause that can lead to screen flickering is power shortage. There are chances that your TV is not getting enough electricity to work properly. This could be the result of a loose power cable or a damaged power source.


Outdated Firmware

Just like smartphones, smart TVs also require up-to-date firmware. The latest firmware fixes most of the software-related problems. However, if you keep using outdated firmware, your TVwill get prone to several issues, including a black screen and occasional flickering.


Protection Mode

Most Sharp TVs come with a protection mode that can be caused due to a wrong voltage or broken contact. While your TV is in protection mode, it won’t be able to work properly to protect the internal circuit.


Sharp TV flickering screen


How do I fix a Sharp TV screen that keeps flickering?

You can fix a Sharp TV screen that keeps flickering by firmly connecting cables, checking the signal connection, updating the firmware, or turning off the protection mode.


Power OFF and ON your TV[Method 1]

  1. Turn off your Sharp TV
  2. Unplug it
  3. Push the power button for 30 seconds
  4. Let your TV rest for up to 60 seconds
  5. Plug it back in
  6. Turn it ON


Check the cable connection[Method 2]

Mostly, Sharp TV starts flickering due to cable issues, whether the cables are damaged or not connected properly. To resolve this issue, firmly connect the power cable and HDMI cables to connection ports.

Alternatively, if the cables are damaged, you’ll need to change them. You can also check if the connection ports are sabotaged by using the same HDMI cable in a different port.


Turn off the protection mode[Method 3]

  1. Unplug your TV
  2. Press and hold the power button for 10 seconds
  3. Wait for a minute
  4. Plug it back in


Update the Firmware[Method 4]

  1. Press the “Menu” button
  2. Go to “Settings”
  3. Open “Support”
  4. Select the “Check Software Update” option
  5. Press “Yes” to update the OS


Check the input source[Method 5]

You also need to make sure your TV is getting enough electricity. For this approach, you can check if the power cable is connected firmly to the power source. Also, if you are using cable service, ensure that the TV box is working properly.


Change display settings[Method 6]

  1. Go to “Settings”
  2. Navigate to “Picture or Screen Settings”
  3. Change the Display Resolution to 720p
  4. Also, change the Picture Size or Screen Size
  5. Restart your TV


Turn off the Energy Saving Mode[Method 7]

  1. Open “Settings as Administrator”
  2. Select the “Energy Save” option
  3. Go to “Power Management Settings”
  4. Turn off the “Auto Power” option
  5. Restart your TV


Change Faulty Components[Method 8]

If you are using external components with your TV, like an inverter or extender, you should make sure they are working properly. Sometimes, faulty components can lead to flickering and a black screen. In that scenario, you should remove all the external components and restart your TV.


Factory Reset your TV[Method 9]

  1. Press the “Menu” button on your remote
  2. Navigate to “Setup”
  3. Select the “Reset” option
  4. Enter your password or “0000”
  5. Confirm the action


What does it mean when my Sharp TV is flickering?

If your Sharp TV starts to flicker randomly, it means whether the cable connection is loose or your TV is not getting enough power.


Why is my Sharp TV flickering on and off?

The most common reason why your Sharp TVis flickering on and off is that it is overheating or not getting enough energy.


How to Fix It:

  1. Let your TVcool down
  2. Make sure the power cord is firmly connected
  3. Ensure the sleep timer is correctly set
  4. Check if the remote sensor is functioning properly
  5. Restart your TV


Why does my Sharp TV screen keep flickering lines?

If your Sharp TV screen is flickering lines, it might be due to a faulty component, loose cable connection, or Energy Saving feature.


How to fix flickering horizontal lines on a Sharp TV?

Sharp Aquos will flicker horizontal lines if it is not getting enough power. So, to fix this problem, you should check the power connection and cable connection.


How to Fix It:

  1. Make sure your device is getting enough power
  2. Ensure the power cord is not loose
  3. Power on your TV using a different circuit
  4. Check the HDMI cables
  5. Firmly connect all the cables to your TV
  6. Remove external components
  7. Restart your TV


How to fix flickering vertical lines on a Sharp TV?

Vertical lines on the Sharp TV screen can be caused by several reasons, including a loose cable connection, a damaged screen, malfunctioned main logic board, and more.

How to Fix It:

  1. Change the cables; HDMI and Power
  2. Turn off your TV for 60 seconds
  3. Remove the driver box
  4. Get your damaged screen fixed
  5. Make sure your device is getting enough signals


Why is my Sharp TV screen black and flickering?

If your Sharp TV’s screen turns black or flickers randomly, it is due to auto-brightness setting, energy-saving mood, and power shortage.


How to Fix It:

  1. Turn off the Energy Saving Mode
  2. Adjust your room’s brightness level
  3. Make sure your device is getting enough electricity
  4. Check if the Power LED works fine
  5. Factory reset your TV

Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

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